package com.example.yls.demoa;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {
    private ListView stuListView;
    private ArrayList<Student> studentArrayList = new ArrayList<>();
    private ArrayList<Student> studentResultList = new ArrayList<>();
    private StuAdapter adapter;
    private Button btnAddStu;
    private Button btnDelStu;
    private EditText edtKeyword;
    private Button btnSearch;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        initStuArrayList();
        initAdapter();
        initListView();
        initAddBtn();
        initDelBtn();
        initSearch();

}
/*搜索*/
    private void initSearch() {
        edtKeyword = findViewById(R.id.edt_keyword);
        btnSearch = findViewById(R.id.btn_search);
        btnSearch.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String keyword = edtKeyword.getText().toString().trim();
                search(studentArrayList,keyword);
                adapter.changeData(studentResultList);
            }
        });
        edtKeyword.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

            }

            @Override
            public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {

            }

            @Override
            public void afterTextChanged(Editable editable) {
                String keyword = edtKeyword.getText().toString().trim();
                search(studentArrayList,keyword);
                adapter.changeData(studentResultList);
            }
        });
    }

    private void search(ArrayList<Student> studentArrayList, String keyword) {
        studentResultList.clear();
        for(int i=0;i<studentArrayList.size();i++){
            Student s = studentArrayList.get(i);

            if(s.getName().contains(keyword)){
                studentResultList.add(s);
            }
            else if(String.valueOf(s.getAge()).equals(keyword)){
                studentResultList.add(s);
            }
        }
    }

    private void initDelBtn() {
        btnDelStu = findViewById(R.id.btn_delStu);
        btnDelStu.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent();
                intent.setClass(MainActivity.this,
                        DeleteActivity.class);
                startActivityForResult(intent,1002);
            }
        });

    }

    private void initAddBtn() {
        btnAddStu = findViewById(R.id.btn_addStu);
        btnAddStu.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent();
                intent.setClass(MainActivity.this,
                        AddActivity.class);
                startActivityForResult(intent, 1001);
            }
        });
    }

    private void initListView() {
        stuListView = findViewById(R.id.lv_stu);
        stuListView.setAdapter(adapter);

        stuListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                Toast.makeText(MainActivity.this,
                        "姓名"+studentArrayList.get(i).getName() + " 年龄"
                                +  studentArrayList.get(i).getAge(),
                        Toast.LENGTH_SHORT)
                        .show();
            }
        });
    }

    /*初始化*/
    private void initAdapter() {
         adapter = new StuAdapter(MainActivity.this, studentArrayList);
    }


    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        Log.e("MainActivity",
                "requestCode = " + requestCode + " resultCode = " + resultCode);

        if(data == null){
            return;
        }
        if(requestCode==1001){
        String name = data.getStringExtra("NAME");
        int age = data.getIntExtra("AGE", 0);
        int imgId = data.getIntExtra("IMG", R.drawable.dog1);

        Student s = new Student(name, age, imgId);
        studentArrayList.add(s);
        adapter.notifyDataSetChanged();

        }
        if(requestCode==1002){
            String name = data.getStringExtra("NAME");
            int age = data.getIntExtra("AGE", 0);
            int imgId = data.getIntExtra("IMG", R.drawable.dog1);

            Student s = new Student(name, age, imgId);
            studentArrayList.remove(s);
            adapter.notifyDataSetChanged();
        }
    }




    /**
     * 初始化学生列表的数据
     */
    private void initStuArrayList() {
        Student s1 = new Student("张一", 18, R.drawable.dog1);
        Student s2 = new Student("张二", 19, R.drawable.dog2);
        Student s3 = new Student("张三", 20, R.drawable.dog3);
        Student s4 = new Student("张四", 21, R.drawable.dog4);
        Student s5 = new Student("张五", 22, R.drawable.dog5);

        studentArrayList.add(s1);
        studentArrayList.add(s2);
        studentArrayList.add(s3);
        studentArrayList.add(s4);
        studentArrayList.add(s5);

    }
}
